Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1998-11-12
2000-02-15
Nguyen, Matthew
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363131, H02M 3335
Patent
active
06025999&
ABSTRACT:
A power supply and a method of operating the same. In one embodiment, the power supply includes: (1) a DC-DC converter having an isolation transformer that conveys an alternating voltage of about a first frequency between a primary winding and at least one secondary winding thereof and (2) a four-quadrant inverter, coupled to one of the at least secondary winding, that converts a portion of the alternating voltage into a waveform having about a second frequency that is less than the first frequency, including: (2a) a bi-directional switch, coupled between an input and an output of the four-quadrant inverter and (2b) a controller, coupled to the switch, that activates the switch to couple the input to the output during a portion of a switching cycle of the alternating voltage to change voltages in the waveform.
REFERENCES:
patent: 4866587 (1989-09-01), Wadlington
U.S. Patent Application entitled "Power Supply Employing Circulating Capacitor and Method of Operation Thereof" by Mark E. Jacobs, et al., Filed on Nov. 12, 1998, U.S. Serial No. 09/191,441.
U.S. Patent Application entitled "Controller for Power Supply and Method of Operation Thereof" by Mark E. Jacobs, et al., filed on Nov. 12, 1998, U.S. Serial No. 09/191,442.
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Farrington Richard W.
Jacobs Mark E.
Mao Hengchun
Thottuvelil Vijayan J.
Lucent Technologies - Inc.
Nguyen Matthew
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